Sofa



FIG. 1 is a perspective view of a sofa showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a perspective view of the sofa in an alternate configuration.

The broken lines in the drawings depict portions of the sofa that formno part of the claimed design.

CLAIM The ornamental design for a sofa, as shown and described.